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- 6AG1952-1AL00-4AA0
- RAM Memory Card
- Germany
- 130 × 90 × 10 mm
- 0.044 kg
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Product Overview
The Siemens 6AG1952-1AL00-4AA0 SIPLUS S7-400 RAM Memory Card is a memory accessory designed for compatible SIMATIC S7-400 programmable logic controllers. It provides 2 MB of RAM storage for controller applications that require additional memory capacity for program execution and data handling.
As part of the Siemens SIPLUS product range, this memory card is based on the standard SIMATIC memory card model 6ES7952-1AL00-0AA0 and incorporates additional protection for specified industrial environmental conditions. Its conformal coating helps protect electronic components against certain environmental influences, making it suitable for applications where environmental exposure is an important consideration.
Memory cards are essential components in many PLC architectures. They provide storage capacity used by the controller for application-related information and support the operation and maintenance of industrial automation systems. Selecting the correct memory card is important because compatibility depends on the controller family, memory-card type, capacity, and hardware configuration.
The 6AG1952-1AL00-4AA0 has a 2 MB capacity and is associated with the SIMATIC S7-400 platform. It is intended for compatible SIPLUS S7-400 configurations rather than general-purpose computer or consumer memory applications.
For industrial maintenance teams, this product can be relevant when replacing an existing memory card, maintaining a legacy S7-400 control system, or sourcing a specific SIPLUS component for an established automation installation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Product Series | SIPLUS S7-400 |
| Model Number | 6AG1952-1AL00-4AA0 |
| Product Type | RAM Memory Card |
| Memory Capacity | 2 MB |
| Based on Standard Model | 6ES7952-1AL00-0AA0 |
| Compatible Controller Family | SIMATIC S7-400, subject to CPU compatibility |
| Memory Technology | RAM |
| Environmental Protection | Conformal coating |
| Specified Operating Temperature | 0 to +60°C |
| Dimensions Provided | 130 × 90 × 10 mm |
| Weight | 0.044 kg |
| Typical Application | PLC program and data memory support |
| Product Category | Industrial Automation Memory Accessory |
Note: The dimensions correspond to the supplied listing and the published packaging dimensions. Confirm the actual card dimensions and packaging configuration before using these measurements for mechanical installation or shipping calculations.
Function and Working Principle
The Siemens 6AG1952-1AL00-4AA0 provides memory capacity for compatible SIMATIC S7-400 controller configurations. Its function is related to the storage architecture of the PLC rather than direct input or output signal processing.
1. RAM Memory Storage
RAM, or Random Access Memory, is a type of electronic memory that allows stored information to be accessed and modified during operation.
In an industrial PLC system, memory supports the storage and handling of information required by the controller. Depending on the CPU architecture and configuration, this can include application-related data and program information.
The 2 MB capacity of the 6AG1952-1AL00-4AA0 is intended for compatible S7-400 configurations. Engineers should check the CPU’s supported memory-card types and capacity requirements before installation.
2. Support for PLC Application Execution
A PLC executes its control program continuously according to its configured operating cycle. During this process, the controller accesses program instructions and data needed to manage machine operations.
The memory card provides storage capacity within the supported S7-400 memory architecture. It does not independently execute automation logic or perform signal processing. Those functions remain the responsibility of the CPU and the connected I/O modules.
3. Data Retention Considerations
RAM is generally volatile memory, meaning that its contents depend on the memory architecture and the availability of the required power or backup arrangement.
The actual retention behavior of a memory card in an S7-400 system depends on the CPU model, its backup battery or other supported retention mechanisms, and the system configuration.
Before replacing or removing a memory card, maintenance personnel should follow Siemens procedures for backing up the application and protecting important controller data. A replacement card should not be assumed to contain the original PLC program.
4. SIPLUS Environmental Protection
The 6AG1952-1AL00-4AA0 belongs to the SIPLUS range and is based on the standard 6ES7952-1AL00-0AA0 model. Its conformal coating provides additional protection for electronic components against specified environmental influences.
The documented temperature range for this variant is 0 to +60°C. The coating does not mean that the card is waterproof or suitable for unrestricted exposure to chemicals, condensation, or extreme temperatures.
Installation should remain within the environmental limits specified for the product and the associated PLC hardware.
Role in Industrial Control Systems
The 6AG1952-1AL00-4AA0 supports the memory architecture of compatible SIMATIC S7-400 controllers. It is one part of a larger automation system that may include CPUs, digital and analog I/O modules, communication processors, power supplies, and engineering workstations.
PLC Program and Data Management
The S7-400 CPU performs the main control tasks in an automation system. It processes input information, executes programmed logic, and updates outputs according to the control strategy.
The memory card provides the supported storage resource required by the configured CPU. Its role is particularly relevant in systems where the controller’s memory architecture requires a removable memory card.
Support for Industrial Process Control
S7-400 controllers are used in a variety of industrial control environments. They may coordinate production sequences, monitor process conditions, and manage communication between field devices and supervisory systems.
The memory card contributes to the controller’s storage arrangement but does not directly connect field instruments or control actuators.
Maintenance and Replacement
In an established automation installation, the original memory-card model may be specified in maintenance documentation and equipment records.
Using the correct replacement helps maintain the intended hardware configuration. A card with a different capacity, technology, or product variant should not be substituted without confirming compatibility with the installed CPU.
Industrial Applications
The SIPLUS S7-400 platform is used in industrial automation systems where reliable programmable control is required. The 6AG1952-1AL00-4AA0 can support compatible controller installations in the following environments.
1. Manufacturing Automation
Manufacturing systems use PLCs to coordinate production equipment, monitor machine states, and execute automated sequences.
An S7-400 controller can manage interconnected machines and production processes. The memory card supports the controller’s required memory configuration and can be relevant to maintenance and replacement activities.
2. Process Automation
Industrial process-control systems often use PLCs to coordinate pumps, valves, motors, sensors, and other field equipment.
The S7-400 platform can be integrated into process-control architectures where the CPU executes application logic and communicates with connected modules. The memory card provides the storage resource required by the compatible controller configuration.
3. Power and Utility Systems
Power-related and utility installations may use programmable controllers to supervise auxiliary equipment, monitor operating conditions, and coordinate control sequences.
In these systems, maintaining the correct PLC hardware configuration is important for equipment availability and long-term support. The 6AG1952-1AL00-4AA0 may be required when maintaining a compatible SIPLUS S7-400 installation.
4. Infrastructure and Facility Automation
Large facilities may use industrial controllers to coordinate ventilation, water treatment, pumping, and other technical systems.
A compatible S7-400 CPU can execute the control logic for these applications, while the memory card supports the controller’s storage requirements.
5. Legacy Automation System Maintenance
Many industrial plants continue to operate established S7-400 control systems. Replacing a specific memory-card model may be necessary during maintenance, troubleshooting, or restoration of an existing controller.
Using the exact catalog number helps reduce the risk of incompatibility and avoids unnecessary changes to the original hardware configuration.
Installation and System Integration
Correct installation is important for protecting the memory card and maintaining the integrity of the PLC application.
1. Verify CPU Compatibility
Before installing the 6AG1952-1AL00-4AA0, identify the exact SIMATIC S7-400 CPU model and verify that it supports the specified memory-card type and capacity.
Do not assume that all S7-400 CPUs support every memory-card variant. Consult the applicable CPU documentation and hardware configuration information.
2. Back Up the Existing PLC Application
Before removing an installed memory card, follow the approved backup procedure for the control system.
Record the CPU model, hardware configuration, program version, and relevant operating parameters. Where possible, create and verify a backup using the appropriate Siemens engineering tools.
This is particularly important in operating plants where the PLC program may contain application-specific logic and commissioning changes.
3. Follow the Correct Installation Procedure
Install the memory card according to the instructions for the specific S7-400 CPU. Observe the required power isolation and handling procedures.
Avoid touching exposed contacts unnecessarily. Protect the card from electrostatic discharge, dust, moisture, and mechanical damage during installation.
4. Check Environmental Conditions
The SIPLUS variant is documented for an operating temperature range of 0 to +60°C. Ensure that the PLC cabinet remains within the specified environmental limits.
Although conformal coating provides additional protection, it does not remove the need for proper cabinet design, ventilation, cleanliness, and environmental control.
5. Verify Controller Recognition
After installation, check that the CPU recognizes the memory card and that the controller starts according to the intended configuration.
Review diagnostic information and confirm that the correct application data is available. If the controller reports a memory-card or configuration fault, check the card’s part number, condition, insertion, and CPU compatibility.
6. Document the Replacement
Record the replacement date, card model, CPU model, and backup status in the maintenance documentation.
Keeping an accurate record of memory-card replacements can simplify future troubleshooting and help prevent the installation of incompatible components.
Compatible System Components
The 6AG1952-1AL00-4AA0 is intended for use within compatible SIMATIC S7-400 configurations. The following components may be part of the same automation architecture.
| Component | Function | Integration Considerations |
|---|---|---|
| SIMATIC S7-400 CPU | Executes PLC application logic | Verify memory-card compatibility with the exact CPU |
| S7-400 Rack | Provides mechanical and electrical module installation | Confirm the installed rack and CPU configuration |
| S7-400 Power Supply | Supplies operating power to the PLC rack | Check voltage, current capacity, and rack requirements |
| Digital Input Module | Receives discrete field signals | Confirm signal voltage and channel configuration |
| Digital Output Module | Controls discrete field devices | Verify load ratings and output type |
| Analog Input Module | Receives analog process signals | Check signal range and module configuration |
| Analog Output Module | Provides analog control signals | Confirm output type and connected device requirements |
| Communication Processor | Supports industrial network communication | Verify compatibility with the CPU and network architecture |
| Engineering Workstation | Supports PLC programming and diagnostics | Use compatible Siemens engineering software and project files |
These components are examples of equipment that may be used in an S7-400 installation. They are not included with the memory card.
Alternative Models and Replacement Considerations
The 6AG1952-1AL00-4AA0 is a SIPLUS S7-400 RAM memory card with a 2 MB capacity. Replacement selection should consider memory technology, capacity, CPU compatibility, and environmental requirements.
| Model | Product Description | Replacement Considerations |
|---|---|---|
| 6ES7952-1AL00-0AA0 | Standard SIMATIC S7-400 RAM Memory Card, 2 MB | Base model for the SIPLUS variant; environmental protection differs |
| 6AG1952-1AM00-7AA0 | SIPLUS S7-400 RAM Memory Card, 4 MB | Different capacity and product configuration |
| 6AG1952-1AP00-7AA0 | SIPLUS S7-400 RAM Memory Card, 8 MB | Requires CPU compatibility verification |
| 6AG1952-1AS00-7AA0 | SIPLUS S7-400 RAM Memory Card, 16 MB | Different memory capacity |
| 6AG1952-1AY00-7AA0 | SIPLUS S7-400 RAM Memory Card, 64 MB | Higher-capacity option for supported configurations |
| 6AG1952-1KT00-4AA0 | SIPLUS S7-400 FEPROM Memory Card, 32 MB | Different memory technology; not a direct RAM replacement |
Before selecting an alternative, verify:
- Exact CPU model and hardware revision.
- Supported memory-card type.
- Required memory capacity.
- RAM or FEPROM technology.
- Environmental operating range.
- SIPLUS protection requirements.
- Application backup and restoration procedures.
- Controller firmware and configuration requirements.
A card with a larger capacity is not automatically compatible with every CPU. Similarly, a standard SIMATIC memory card should not automatically be treated as equivalent to a SIPLUS variant when environmental protection is part of the installation requirements.
Key Advantages
2 MB Memory Capacity
The card provides 2 MB of RAM capacity for compatible S7-400 controller configurations.
Designed for SIMATIC S7-400
Its product configuration is intended for the S7-400 platform, making it relevant to maintenance and replacement work on compatible PLC installations.
SIPLUS Product Configuration
The 6AG1952-1AL00-4AA0 is based on the standard 6ES7952-1AL00-0AA0 model and incorporates additional environmental protection through conformal coating.
Industrial Environmental Suitability
The specified 0 to +60°C operating temperature range supports installations operating within the documented limits.
Compact and Lightweight Design
With a supplied weight of 0.044 kg, the memory card is a compact accessory that can be stored and handled as part of an industrial automation spare-parts inventory.
Support for Legacy System Maintenance
The card can be useful when maintaining existing S7-400 installations that require the exact 2 MB SIPLUS memory-card configuration.
Technical FAQs
1. What is the Siemens 6AG1952-1AL00-4AA0?
It is a SIPLUS S7-400 RAM memory card with a 2 MB capacity. It is designed for compatible Siemens SIMATIC S7-400 controller configurations.
2. What is the memory capacity?
The specified capacity is 2 MB RAM.
3. Which PLC family is it designed for?
It is intended for compatible SIMATIC S7-400 CPUs. The exact CPU model should be checked before installation.
4. What is the difference between 6AG1952-1AL00-4AA0 and 6ES7952-1AL00-0AA0?
The 6AG1952-1AL00-4AA0 is the SIPLUS variant based on the standard 6ES7952-1AL00-0AA0. The SIPLUS version incorporates conformal coating and has its own specified environmental characteristics.
5. What is the operating temperature range?
The documented operating temperature range for this SIPLUS variant is 0 to +60°C.
6. Is this a RAM or FEPROM memory card?
It is a RAM memory card. It should not be confused with a FEPROM memory card, which uses a different memory technology and has different application characteristics.
7. Can it be used with S7-1200 or S7-1500 PLCs?
No. This product is associated with the SIMATIC S7-400 memory architecture. S7-1200 and S7-1500 controllers use different memory-card arrangements.
8. Does the memory card contain a PLC program when purchased?
Not necessarily. A replacement card should not be assumed to contain the application program from the original installation. Confirm the card’s contents and follow the correct backup and restoration procedure.
9. What should be checked before purchasing?
Verify the complete part number, memory capacity, CPU compatibility, product condition, and environmental requirements. For used components, request clear photographs and available test information.
10. Why choose the SIPLUS version instead of the standard memory card?
The SIPLUS variant incorporates additional protection for specified industrial environmental conditions. It may be appropriate where the original system design requires the SIPLUS configuration. Selection should follow the actual environmental requirements and Siemens documentation.
Procurement and Maintenance Recommendations
When sourcing the Siemens 6AG1952-1AL00-4AA0, verify the complete catalog number and confirm that the card is the 2 MB SIPLUS S7-400 RAM variant. Do not confuse it with other S7-400 memory cards that have different capacities or use FEPROM technology.
For replacement projects, check the installed CPU model and consult the relevant hardware documentation. Confirm whether the application requires the SIPLUS environmental protection characteristics or whether the standard memory-card configuration is appropriate.
For used or surplus components, inspect the card and its contacts for visible damage, corrosion, or contamination. Request information about storage conditions and previous use where available. Confirm the supplier’s testing and warranty arrangements before installation in a critical control system.
During maintenance, keep an up-to-date backup of the PLC application and document all memory-card changes. Follow the CPU-specific procedures for removing, installing, and validating the card. Avoid assuming that a replacement component contains the correct program or configuration data.
Conclusion
The Siemens 6AG1952-1AL00-4AA0 SIPLUS S7-400 RAM Memory Card is a 2 MB memory accessory designed for compatible SIMATIC S7-400 programmable controllers. Based on the standard 6ES7952-1AL00-0AA0 model, it incorporates conformal coating for additional protection under specified industrial environmental conditions.
With its defined memory capacity and SIPLUS configuration, the card is relevant to industrial automation maintenance, PLC memory replacement, and the continued operation of compatible S7-400 systems. Before purchasing or installing the component, verify the CPU compatibility, memory requirements, environmental conditions, and application backup procedures.